... elementary and middle school students in the countryside 农村中小学生 收藏 middle and elementary school teachers 中小学教师 收藏 Elementary students’ heart and blood vessel function 小学生心血管功能 收藏 ...
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According to classroom teachers, elementary and middle school students who stay up late exhibit more learning and attention problems.
根据课堂老师的说法，熬夜的中小学生表现出更多的学习问题和注意力问题。
Subjects: Elementary teachers specialize in a specific content area much like middle and high school teachers in the US.
学科：小学老师都有教专门的科目，非常像美国的初中和高中（美国小学老师需要教所有科目）。
Sources: American Federation of teachers; interviews with elementary and middle school teachers in California, Connecticut, Georgia, Iowa, Minnesota, New York, and Texas.
资料来源：美国教师联合会，采访了来自加利福尼亚、康乃狄格、乔治亚、衣阿华、明尼苏达、纽约和德克萨斯州的中小学教师。
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